Validate local_ip for Linuxbridge agent
Validate local_ip for Linuxbridge agent

As oslo.config has introduced Opts for IPv4/6 address,
the local_ip of linuxbridge agent needs to be verified.

Change-Id: I806eaae38c04e30dd81c8a5f711c196946b04316

jerryz1982/neutron,silenci/neutron,projectcalico/calico-neutron,projectcalico/calico-neutron,wolverineav/neutron,noironetworks/neutron,mmnelemane/neutron,mahak/neutron,eonpatapon/neutron,sasukeh/neutron,waltBB/neutron_read,dhanunjaya/neutron,skyddv/neutron,aristanetworks/neutron,cloudbase/neutron-virtualbox,asgard-lab/neutron,openstack/neutron,cloudbase/neutron,javaos74/neutron,chitr/neutron,bigswitch/neutron,cisco-openstack/neutron,wenhuizhang/neutron,chitr/neutron,yanheven/neutron,Stavitsky/neutron,klmitch/neutron,neoareslinux/neutron,takeshineshiro/neutron,alexandrucoman/vbox-neutron-agent,JianyuWang/neutron,SmartInfrastructures/neutron,wolverineav/neutron,bgxavier/neutron,cloudbase/neutron,MaximNevrov/neutron,pnavarro/neutron,sasukeh/neutron,miyakz1192/neutron,adelina-t/neutron,eonpatapon/neutron,suneeth51/neutron,rdo-management/neutron,jerryz1982/neutron,mattt416/neutron,paninetworks/neutron,dims/neutron,shahbazn/neutron,jumpojoy/neutron,magic0704/neutron,suneeth51/neutron,Stavitsky/neutron,antonioUnina/neutron,waltBB/neutron_read,adelina-t/neutron,swdream/neutron,watonyweng/neutron,huntxu/neutron,swdream/neutron,JioCloud/neutron,asgard-lab/neutron,huntxu/neutron,openstack/neutron,dims/neutron,sebrandon1/neutron,NeCTAR-RC/neutron,eayunstack/neutron,Metaswitch/calico-neutron,skyddv/neutron,mmnelemane/neutron,mahak/neutron,sebrandon1/neutron,apporc/neutron,openstack/neutron,wenhuizhang/neutron,magic0704/neutron,infobloxopen/neutron,yuewko/neutron,blueboxgroup/neutron,NeCTAR-RC/neutron,jacknjzhou/neutron,SamYaple/neutron,alexandrucoman/vbox-neutron-agent,pnavarro/neutron,noironetworks/neutron,paninetworks/neutron,mahak/neutron,mandeepdhami/neutron,SamYaple/neutron,Metaswitch/calico-neutron,JioCloud/neutron,vivekanand1101/neutron,neoareslinux/neutron,cisco-openstack/neutron,MaximNevrov/neutron,yanheven/neutron,igor-toga/local-snat,rdo-management/neutron,jacknjzhou/neutron,watonyweng/neutron,SmartInfrastructures/neutron,jumpojoy/neutron,shahbazn/neutron,takeshineshiro/neutron,eayunstack/neutron,blueboxgroup/neutron,klmitch/neutron,mandeepdhami/neutron,vivekanand1101/neutron,barnsnake351/neutron,dhanunjaya/neutron,barnsnake351/neutron,mattt416/neutron,aristanetworks/neutron,apporc/neutron,igor-toga/local-snat,antonioUnina/neutron,infobloxopen/neutron,blueboxgroup/neutron,javaos74/neutron,bgxavier/neutron,miyakz1192/neutron,bigswitch/neutron,silenci/neutron,cloudbase/neutron-virtualbox,glove747/liberty-neutron,glove747/liberty-neutron,yuewko/neutron,JianyuWang/neutron